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WorksheetsActivity 3_cell energy
Total questions: 34
Worksheet time: 18mins
What is entropy a measure of?
The energy required to start a reaction
The degree of disorder
The speed of a chemical reaction
The amount of energy released in a reaction
What is an energy diagram?
A chart showing enzyme activity
A visual representation of energy changes during a chemical reaction
A graph of temperature changes
A diagram of molecular structures
What is an enzyme-substrate complex?
A permanent bond between enzyme and substrate
The temporary complex formed when an enzyme binds to its substrate
A complex that inhibits enzyme activity
A structure that stores energy
What are allosteric sites on enzymes?
Sites that bind only to substrates.
Regions that bind to molecules other than the substrate.
Sites that are permanently blocked.
Regions that destroy the enzyme.
What is photosynthesis?
The process of breaking down glucose.
The conversion of light energy into chemical energy.
The process of cellular respiration.
The conversion of chemical energy into light energy.
What is the role of an allosteric site in enzyme activity?
It is the main active site for substrates.
It binds to molecules other than the substrate.
It permanently deactivates the enzyme.
It enhances the enzyme's ability to bind substrates.
What are grana?
Stacks of thylakoid membranes within chloroplasts.
The fluid-filled space within chloroplasts.
Pigments found in chlorophyll.
A group of accessory pigments.
What do chlorophyll a and b do?
Absorb light most efficiently in the blue and red parts of the spectrum, essential for photosynthesis.
Protect the chlorophyll from excess light energy.
Capture light energy and funnel it to the reaction center.
Convert light energy into chemical energy.
What is the primary function of the reaction center in photosynthesis?
Convert light energy into chemical energy.
Absorb light most efficiently in the blue and red parts of the spectrum.
Protect the chlorophyll from excess light energy.
Capture light energy and funnel it to the reaction center.
What is aerobic respiration?
The process by which cells use oxygen to break down glucose and produce energy
The process by which cells break down glucose in the absence of oxygen
The process of splitting water molecules
The range of light wavelengths a substance can emit
What is cytochrome C's role in cellular respiration?
It is a substrate in the Krebs cycle.
It is a protein that carries electrons in the electron transport chain.
It converts pyruvate into acetyl-CoA.
It is a gradient of protons across a membrane.
What is the function of acetyl-coenzyme A (acetyl-CoA) in cellular respiration?
It is a substrate in the Krebs cycle.
It is a two-carbon molecule that enters the citric acid cycle.
It carries electrons in the electron transport chain.
It is a gradient of protons across a membrane.
Which compound is commonly associated with muscle fatigue during intense anaerobic exercise?
Ethanol
Lactic acid
Glucose
ATP
What is the primary role of NADH in cellular respiration?
To act as a substrate in glycolysis.
To carry electrons to the electron transport chain.
To convert glucose into pyruvate.
To generate ATP directly.
What is the Calvin cycle?
The process of converting light energy into chemical energy.
The series of reactions that synthesize glucose from carbon dioxide and water.
The breakdown of glucose into pyruvate.
The transport of electrons in the mitochondria.
What is the function of ATP synthase in cellular respiration?
To break down glucose into pyruvate.
To synthesize ATP from ADP and inorganic phosphate.
To transport electrons in the electron transport chain.
To convert pyruvate into acetyl-CoA.
What happens to the reaction rate if an enzyme is denatured or nonfunctional?
No change in the reaction rate
Increase in reaction rate
Decrease in reaction rate
Decrease then increase in reaction rate
Which organic molecule is primarily used by cells as a source of energy?
amino acid
fatty acid
glucose
protein
What is the primary function of chlorophyll in photosynthesis?
To absorb light energy and convert it into chemical energy.
To transport electrons in the electron transport chain.
To synthesize ATP from ADP and inorganic phosphate.
To break down glucose into pyruvate.
Which term means "熵" in English
Entropy
Energy
Enzyme
Ecosystem
The English term for "放能反应" is:
Endergonic reaction
Exothermic reaction
Exergonic reaction
Energetic reaction
What does "cellular respiration" translate to in Chinese?
细胞呼吸
细胞分裂
细胞周期
细胞死亡
Which term means "光合作用" in English
Photosynthesis
Photolysis
Phototropism
Photoperiodism
What does "有氧呼吸" translate to in English
Anaerobic respiration
Aerobic respiration
Fermentation
Glycolysis
The English term for "乳酸" is:
Lactic acid
Lactose
Lactalbumin
Lactate
What does "底物" translate to in English
Substrate
Base
Substance
Subject
The English term for "天线色素" is:
Antenna Dyes
Antenna Pigments
Antenna Chromophores
Antenna Complex
The English term for "碳固定" is:
Carbon Cycle
Carbon Release
Carbon Emission
Carbon Fixation
The term "光呼吸" in English is:
Photorespiration
Photoreaction
Phototropism
Photolysis
Letter "A" represents the ___________
Prokaryote
Active site
Product
Substrate
